The 2021 Hyundai Elantra HEV is available as a 4-door, 5-seat sedan. Starting at $23,550, the 2021 Hyundai Elantra HEV SEL is powered by a 1.6LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 49-mpg in the city and 52-mpg on the highway. The top of the line 2021HyundaiElantra HEVLimited , priced at $ 28,100 , is powered by a 1.6LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 49-mpg in the city and 52-mpg on the highway.